If you are taking a multiple-choice test with 21 questions and each question has 6 choices (only one of which is correct), how many correct questions will you expect if you guess the answers randomly? (Give your answer in 2 d.p)

If you are taking a multiple-choice test with 21 questions and each question has 6 choices (only one of which is correct), how many correct questions will you expect if you guess the answers randomly? (Give your answer in 2 d.p)

A First Course in Probability (10th Edition)

10th Edition

ISBN:9780134753119

Author:Sheldon Ross

Publisher:Sheldon Ross

Chapter1: Combinatorial Analysis

Section: Chapter Questions

Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...

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